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9041326 Method for operating a brushless electric motor  
A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring...
9030135 Electrically operated power steering device  
An electric power steering apparatus includes an EPS actuator that applies assist force to a steering system, and an ECU that controls operation of the EPS actuator. The ECU includes an inverter...
9024563 Pitch motor drive circuit which can operate in emergency mode  
A pitch drive circuit that operates in an emergency mode, for a wind or water power plant. The circuit has at least one rectifier unit, at least one DC intermediate circuit, two inverter units and...
9024553 AC motor control apparatus  
A control apparatus of an AC motor improves an electric current estimation accuracy of the AC motor, which includes a three phase motor with an electric current detector to detect an electric...
9024558 Bridge output circuit, motor driving device using the same, and electronic apparatus  
A bridge output circuit includes an output terminal, a high side transistor, a low side transistor, a high side driver for controlling a gate voltage of the high side transistor, a low side driver...
9018871 Power conversion apparatus  
A carrier generating unit applies a carrier that monotonically decreases to a switching control unit during either one of a first period that is a period immediately following a period in which a...
9000711 Power converter  
Provided is a power converter that is capable of ensuring a conduction current without expanding the configuration of a DC voltage conversion circuit such as a DC chopper. Power can be supplied...
8994319 Electric motor and electrical apparatus equipped with same  
An electric motor includes a magnet rotor which is placed with an air gap interposed between it and a stator and has a magnetic pole portion formed from a plastic magnet which swells by hydrogen...
8994318 Electrical on-board network and method for operating an electrical on-board network  
An electrical on-board network of a vehicle, having at least two power circuits and an electrical machine allocated to a drive of the vehicle. The electrical machine has at least two phase...
8988030 Power control for electrical applications over long cables  
This disclosure is drawn to methods, systems, devices and/or apparatus related to power control in applications over long cables. Specifically, the disclosed methods, systems, devices and/or...
8988035 System for determining a magnetizing curve and rotor resistance of an induction machine and method of making same  
A system for identifying magnetizing inductance and rotor resistance of an induction machine comprises an induction machine comprising a rotor and a stator, a DC voltage bus, and a DC-to-AC...
8981701 Apparatus and method for compensating offset of current sensor  
Provided is an apparatus for compensating offset of a current sensor detecting a motor current supplied by an inverter for PWM (Pulse Width Modulation) control of a motor, the apparatus including...
8981704 Motor controller and electric power steering device using the same  
Provided are a motor controller for suppressing a torque pulsation with a simple configuration and obtaining a sufficient output torque in the case of an open-type fault occurring in any one of...
8981706 Electric motor drive apparatus and electric power steering apparatus having the same  
An electric motor drive apparatus includes multiple inverter sections arranged corresponding to winding sets of a motor, multiple relays that controls power supplies to the inverter sections, and...
8975847 Power conversion device  
A power conversion device includes a first capacitor connected in parallel to a direct-current power supply, plural power converters that drive plural synchronous machines, a second capacitor...
8975857 Inverter apparatus and inverter control method  
An inverter apparatus basically includes an inverter, a rotational speed detecting component and a control component. The inverter includes a plurality of pairs of switching elements. The control...
8970148 Method and apparatus for reducing radiated emissions in switching power converters  
A filter for reducing radiated emissions in switching power converters such as a motor drive is disclosed. The switching power converter modulates a DC voltage input to generate a desired AC...
8970159 Method for compensating instantaneous power failure in medium voltage inverter and medium voltage inverter system by using the same  
Provided are a method for compensating instantaneous power failure in medium voltage inverter and a medium voltage inverter system by using the same, the method for compensating instantaneous...
8963478 Drive circuits and systems for motor controller protection  
Protection of a motor controller from a transient voltage and/or an over-voltage condition is described. A drive circuit includes a rectifier portion and at least one inductive device coupled to...
8963479 Power conversion device for a rotary electric machine  
A power conversion device includes an inverter unit and a control unit. The inverter unit includes high SWs and low SWs for each phase of coils of a motor. The control unit, in a case that the...
8957621 Actuator having a multiphase motor, and a method of controlling such an actuator  
An actuator comprising at least one multiphase motor having phases facing a rotor secured to an outlet shaft associated with a braking member and provided with a connection to a movable element...
8947038 Power supply apparatus of home appliance  
A power supply apparatus of a home appliance which meets standby power regulation of 0.5 watts using one SMPS. As compared with a general circuit which meets the standby power regulation using two...
8947024 Battery operated electric motor in a work apparatus  
An electric motor includes an arrangement of windings provided for driving the rotor, with the windings being connected to an energy source to develop torque which drives the rotor. The electric...
8941337 Motor driving device and electric power steering apparatus including motor driving device  
In a motor driving device, a first relay portion is connected between a power source and an inverter portion, a second relay portion is connected between the first relay portion and the inverter...
8937450 Motor driving system and motor system  
A motor driving system including command value output means configured to output an analog value according to a rotation speed command; a first power line having first switching means; a drive...
8937451 Motor control apparatus which discharges stored charge of DC voltage smoothing capacitor when operation becomes halted  
A motor control apparatus has a plurality of DC-to-AC inverter circuits which supply respective electric motors, each inverter circuit formed of a plurality of switching circuits, all of the...
8933655 Equipment and method for measuring the offset angle of a resolver in a synchronous electric machine  
An apparatus for measuring an error in a resolver includes a first calculator that perform an inverse Park transform based on voltages Uq and Ud at an output of PI current regulators, and delivers...
8934258 Motor controller  
A motor controller comprising multiple types of interfaces assigned automatically, including a mother circuit board and a daughter circuit board. The daughter circuit board is plugged into the...
8917050 Power inverter and electric power steering controller  
A power inverter is provided that can apply to an AC rotary machine three-phase voltages of high amplitudes and low distortion while suppressing ohmic loss attributed to current detection...
8912739 Synchronous machine control apparatus  
A synchronous machine control apparatus is characterized by including a magnet condition estimation unit (7, 7a) that estimates the temperature or the magnetic flux of a permanent magnet that...
8896260 Power supply unit for press machine  
A power supply unit for a press machine having a converter (converter circuit) connected to a commercial AC power supply, and an inverter (inverter circuit) connected to a press motor, includes an...
8890465 Circuit arrangement for modular drive power converters  
The invention relates to power converter circuits which are suitable, in particular, for mobile drive systems with stringent requirements in terms of weight minimization and availability as well...
8890463 Direct current bus management controller  
A direct current bus management system can include a power management and distribution unit, having a source management section, a bus management section coupled to the source management section,...
8890451 Sensorless control unit for brushless DC motor  
A command rotation speed is set to an initial rotation speed, and a forced commutation mode is started. In the forced commutation mode, a rotation speed is increased by a predetermined increase...
8884563 System and method for supplementing a generated DC power supply  
A renewable energy source is converted into a desired DC voltage that is delivered to a DC motor controller of a permanent magnet motor. A micro controller monitors the amount of supplied...
8884577 Control apparatus for rotary electric machines  
In a control apparatus for a rotary electric machine receiving power from a DC power supply, a DC-AC converting circuit is provided with serially connected circuits each having high-potential-side...
8878482 Power converting apparatus  
A power converting apparatus includes a timing signal generator and a phase determination signal generator provided in an ON/OFF signal generating unit as well as a detected current correction...
8872455 Method and controller for an electric motor with fault detection  
For each phase of a controller, semiconductor switches comprise a high side switch and a low side switch. A direct current voltage bus provides electrical energy to the semiconductor switches. A...
8866422 Aircraft motor drive control apparatus  
An inverter and a control unit that has a command signal processing unit and a PWM frequency control unit and performs pulse width modulation control are provided. If the command signal processing...
8853985 Back-EMF detection for motor control  
Systems, methods, and other embodiments associated with back-EMF detection for motor control are described. In an embodiment, an apparatus includes a drive circuit configured to apply excitation...
8853989 Fuel cell system and motor driving method  
A motor can be driven while reducing the power loss of the entire system where a plurality of devices that causes power losses exists. The system is provided with an inverter connected to a motor,...
8848324 Apparatus and method for disabling the operation of high power devices  
A drive circuit for delivering high-level power to a load, and method of stopping a high power load from operating, are disclosed. The drive circuit includes a high power circuit capable of being...
8847541 Control method and control device of motor inverter  
A motor inverter is provided with switching elements for each phase of a 3-phase motor, and driving the motor by turning on and off the switching elements. In an example of a control device of the...
8836260 Method and apparatus for reducing torque variation in motor drive systems  
A method for controlling a specific electric machine includes receiving with a controller a back electromotive force (BEMF) coefficient for the specific electric machine. The controller is...
8829826 Regenerative load electric power management systems and methods  
A regenerative load electric power management system can include a system bus, an input filter coupled to the system bus, a first bidirectional solid state power controller coupled to the system...
8829830 Synchronous machine control apparatus  
A control command generator that generates an armature interlinkage flux command and a torque current command by a torque command, a rotation speed, and an operation target command, includes a...
8823307 System for detecting internal winding faults of a synchronous generator, computer program product and method  
A system, method and computer program product for monitoring including detecting internal faults especially inter-turn faults of a synchronous generator and thus protecting the synchronous...
8823296 Combined electric device for powering and charging  
The invention relates to a combined method and device for powering and charging, wherein said device comprises an AC motor (6), a converter (2), storage means (5), and switching means (4) either...
8816631 Apparatus and method for energy efficient motor drive standby operation  
Motor drive apparatus and methods are presented in which a standby controller uses at least one switching device to power an inverter in a normal mode and to remove power from the inverter and...
8818674 Vehicle behavior controller  
Provided is a vehicle behavior controller capable of stabilizing a behavior of a vehicle with a high response when an unstable state of the vehicle is judged. The vehicle behavior controller...